There will be some very frustrated drivers on the Stuart Highway over the next month when three 70-metre long road trains powered by three prime movers head from Darwin to Alice Springs at an expected speed of 40km/hour.

This Sunday the first of the three road trains will leave from Darwin's East Arm Wharf and head down the track to Alice Springs.

The generators are on move over the next month, all bound for Brewer Estate, the new Alice Springs power station.

The escort will only travel during daylight hours and will depart the Darwin Weighbridge first thing on Sunday morning. Police warn that motorists in Darwin and the rural area should be aware that this will be occurring.

The transport logitistics has been enormous with the generators being delivered by sea from China; each generator is 70 metres long, 8 metres high, 5 metres wide and weighs around 360 tonnes.

It is expected that each generator will take five days to reach Alice Springs.

The generators are so enormous that they require quite a convoy with pilot vehicles, a police escort and a team of engineers along for the trip.

Northern Territory Police are urging drivers to patient with the slow speeds and stoppages as the convoy will have to stop before and after each bridge and culvert crossing so the engineers can ensure the Stuart Highway remains safe for travel.

Virginia Read, Acting Superintendent for the Greater Darwin Regional Command says people should be aware of the road train movements.

"I am not only forewarning travellers due to the slow pace, but I also ask that if you do come across the convoy, to obey police direction. This is obviously a very large undertaking and we need assistance from the public to make this process as swift and safe as possible" she said.

The convoy is due to set off from Berrimah Road at 7am on Sunday the 18th of April.